A. Totally enclosed
B. Totally enclosed fan cooled
C. Open type
D. Semi closed
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Related Mcqs:
- ________________ motor is a constant speed motor?
- A. Synchronous motor B. Schrage motor C. Induction motor D. Universal motor...
- A wound rotor induction motor is preferred, as compared to squirrel cage induction motor, when major consideration is____________________?
- A. slop speed operation B. high starting torque C. low windage losses D. all of the above...
- The starting torque of a D.C. motor is independent of which of the following?
- A. Flux B. Armature current C. Flux and armature current D. Speed...
- For blowers which of the following motor is preferred ?
- A. D.C. series motor B. D.C. shunt motor C. Squirrel cage induction motor D. Wound rotor induction motor...
- Which of the following is essentially needed while selecting a motor ?
- A. Pulley B. Starter C. Foundation pedal D. Bearings...
- In which of the following applications the load on motor changes in cyclic order ?
- A. Electric shovels B. Cranes C. Rolling mills D. All of the above...
- For a motor-generator set which of the following motors will be preferred ?
- A. Synchronous motor B. Slip ring induction motor C. Pole changing induction motor D. Squirrel cage induction motor...
- In series motor which of the following methods can be used for changing the flux per pole ?
- A. Tapped field control B. Diverter field control C. Series-parallel control D. Any of the above...
- For a D.C. shunt motor which of the following is incorrect ?
- A. Unsuitable for heavy duty starting B. Torque varies as armature current C. Torque-armature current is a straight line D. Torque is zero for zero armature current...
- While selecting motor for an air conditioner which of the following characteristics is of great importance ?
- A. Type of bearings B. Type of enclosure C. Noise D. Arrangement for power transmis¬sion E. None of the above...
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